One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,7)(3,6,4,8)(9,10)(11,14)(12,13)(15,16)(17,18,21,22)(19,25,27,23)(20,24,30,29)(26,28,32,31)(1,2)(3,6)(4,8)(5,7)(17,19,21,27)(18,23,22,25)(20,28,30,31)(24,26,29,32)(1,3,5,4)(2,6,7,8)(10,13)(14,16)(17,20,21,30)(18,24,22,29)(19,26,27,32)(23,31,25,28)(2,7)(6,8)(10,13)(14,16)(17,19)(18,25)(20,26)(21,27)(22,23)(24,28)(29,31)(30,32) involution — undirected(1,4,5,3)(2,8,7,6)(9,11,12,15)(10,14,13,16)(17,18,21,22)(19,23,27,25)(20,29,30,24)(26,28,32,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.